/ Dictionary / Index A aqua regia: Meaning and Definition of Find definitions for: aq'ua re'gi•a Pronunciation: (rē'jē-u), [key] — Chem. Chem. a yellow, fuming liquid composed of one part nitric acid and three to four parts hydrochloric acid: used chiefly to dissolve metals as gold, platinum, or the like. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aqua pura aquarelle Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language